Union Investment (German pronunciation: [uˌni̯oːn ɪnˈvɛstmɛnt]; formal name Union Asset Management Holding AG) is the investment arm of the DZ Bank Group and part of the cooperative financial services network. It was founded in 1956 and is headquartered in Frankfurt. Trading in open-end funds occurs in part through the 1,101 credit unions in Germany (Volksbanken Raiffeisenbanken Co-operative, including Sparda-Banks, PSD-banks, etc.) and in part through the external services of Bausparkasse Schwäbisch Hall AG, DZ Bank Group's building society.